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 */

package Controller;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author bienphongvnn
 */
@WebServlet(name = "DemoServlet", urlPatterns = {"/DemoServlet"})
public class DemoServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    
    public void service(ServletRequest request, ServletResponse response)
			throws ServletException, IOException {
		PrintWriter out = response.getWriter();
		ServletContext servletContext = 
                                 getServletConfig().getServletContext();
		Enumeration attributes = servletContext.getAttributeNames();
		while (attributes.hasMoreElements()) {
			String attribute = (String) attributes.nextElement();
			out.println("AttributeName: " + attribute);
			out.println("AttributeValue: "+  
                                servletContext.getAttribute(attribute));
		}
		out.println("MajorVersion: "+ servletContext.getMajorVersion());
		out.println("MinorVersion: "+ servletContext.getMinorVersion());
		out.println("Server info : " + servletContext.getServerInfo());
	}

    
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Xin chao cac ban</title>");            
            out.println("</head>");
            out.println("<body>");
            out.println("<form>");
            out.println("<input type = " + "button" + "value = " + "Click" + ">");
            out.println("</form>");
            out.println("<h1>Servlet DemoServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
